Undyne points heroically towards the sky

Notes:

It's the thumbnail for this video(where i found the pic in the first place):

Sadly,the link only led to this page,no source,no anything.
http://img.ifcdn.com/images/defc7258252deef6b32ea3846b3a60ded7f0d04f86b733e24f69c92cbbf7b331_1.jpg